1#! /bin/ksh -p
2#
3# CDDL HEADER START
4#
5# The contents of this file are subject to the terms of the
6# Common Development and Distribution License (the "License").
7# You may not use this file except in compliance with the License.
8#
9# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10# or https://opensource.org/licenses/CDDL-1.0.
11# See the License for the specific language governing permissions
12# and limitations under the License.
13#
14# When distributing Covered Code, include this CDDL HEADER in each
15# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16# If applicable, add the following below this CDDL HEADER, with the
17# fields enclosed by brackets "[]" replaced with your own identifying
18# information: Portions Copyright [yyyy] [name of copyright owner]
19#
20# CDDL HEADER END
21#
22
23#
24# Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
25# Use is subject to license terms.
26#
27
28#
29# Copyright (c) 2013, 2016 by Delphix. All rights reserved.
30#
31
32. $STF_SUITE/include/libtest.shlib
33. $STF_SUITE/tests/functional/snapshot/snapshot.cfg
34
35#
36# DESCRIPTION:
37# A zfs file system snapshot is identical to
38# the originally snapshotted file system, after the file
39# system has been changed. Uses 'cksum'.
40#
41# STRATEGY:
42# 1. Create a file in the zfs file system
43# 2. Checksum the file for later comparison
44# 3. Create a snapshot of the dataset
45# 4. Append to the original file
46# 5. Verify the snapshot and file agree
47#
48
49verify_runnable "both"
50
51function cleanup
52{
53	if snapexists $SNAPFS; then
54		log_must zfs destroy $SNAPFS
55	fi
56
57	log_must rm -rf $SNAPDIR $TESTDIR/*
58}
59
60log_assert "Verify a file system snapshot is identical to original."
61
62log_onexit cleanup
63
64log_note "Create a file in the zfs filesystem..."
65log_must file_write -o create -f $TESTDIR/$TESTFILE -b $BLOCKSZ \
66    -c $NUM_WRITES -d $DATA
67
68log_note "Sum the file, save for later comparison..."
69read -r FILE_SUM _ < <(cksum $TESTDIR/$TESTFILE)
70log_note "FILE_SUM = $FILE_SUM"
71
72log_note "Create a snapshot and mount it..."
73log_must zfs snapshot $SNAPFS
74
75log_note "Append to the original file..."
76log_must file_write -o append -f $TESTDIR/$TESTFILE -b $BLOCKSZ \
77    -c $NUM_WRITES -d $DATA
78
79read -r SNAP_FILE_SUM _ < <(cksum $SNAPDIR/$TESTFILE)
80if [[ $SNAP_FILE_SUM -ne $FILE_SUM ]]; then
81	log_fail "Sums do not match, aborting!! ($SNAP_FILE_SUM != $FILE_SUM)"
82fi
83
84log_pass "Both Sums match. ($SNAP_FILE_SUM == $FILE_SUM)"
85